Advertisements
Advertisements
प्रश्न
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
Advertisements
उत्तर
A volcanic eruption is one of the main causes of earthquakes because volcanic earthquakes are caused by gas explosions. Such earthquakes occur either simultaneously with eruption or more commonly in the period preceding an eruption.
संबंधित प्रश्न
Give a geographical reason.
Buildings collapsed at the foothills of the Himalayas because of an earthquake. Before collapsing, they were moving forward and backward.
Arrange the following statements in chronological order in which an earthquake occurs.
- The earth’s surface vibrates.
- The plates suddenly move.
- Due to the movements in the mantle, compression goes on increasing.
- Along the weak points ( faultlines) rocks break apart.
- Stored energy is released in the form of seismic waves.
Fill in the blank:
Most earthquakes occur on account of the strain in the _________.
Fill in the blank:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
Name two man-made causes of an earthquake.
Match the Columns.
| Column A | Column B |
| 1. Tsunami | (a) The waves that make the inhabitants feel the ground motion. |
| 2. Seismograph | (b) The instrument for measuring the intensity of earthquakes. |
| 3. S-waves | (c) Harbour waves generated by oceanic earthquakes. |
| 4. Richter scale | (d) The point on the earth surface directly above the seismic focus. |
| 5. Epicentre | (e) An instrument for recording the movement of earthquake waves. |
Describe how earthquakes are caused on the surface of the earth.
Explain the three types of earthquake waves.
Is it possible to predict an earthquake? Give reasons to support your answer.
How is the intensity of an earthquake measured?
Earthquakes occur in the Mid-Atlantic belt.
Give reasons for the following:
Folding and faulting frequently go together.
The magnitude of an earthquake is measured by ______.
Choose the odd one
Choose the odd one
Give a note on Tsunami 2004.
An earthquake of magnitude ______ scale can cause damage from things falling.
In India, the Himalayan region and the ______ valley are prone to earthquakes.
Name the point where the vibrations originate in an earthquake.
What is the point of the earth’s surface directly above the focus called?
